IBeX v1: TGG: referenced metamodel project names must start with a capital letter

[maxkratz]

Similar to the findings in this issue (eMoflon/emoflon-ibex-hipe#3), I found myself with a non-compilable code snippet for HiPE when I created a new TGG project with eMoflon::IBeX-TGG (v1).
In particular, the (generated) class HiPERegistrationHelper.java contained some code snippets that probably should be replaced with actual names, e.g., of packages:

[...]
import <<SRC_Package>>.impl.<<SRC_Package>>PackageImpl;
import <<TRG_Package>>.impl.<<TRG_Package>>PackageImpl;
[...]
                // Load and register source and target metamodels
		EPackage <<src_project>>Pack = null;
		EPackage <<trg_project>>Pack = null;
		EPackage tggtestprojectcPack = null;
		
		if(executable instanceof FWD_OPT) {
			Resource res = executable.getResourceHandler().loadResource("platform:/resource/<<TRG_Project>>/model/<<TRG_Project>>.ecore");
			<<trg_project>>Pack = (EPackage) res.getContents().get(0);
			rs.getResources().remove(res);
			
			res = executable.getResourceHandler().loadResource("platform:/resource/Tggtestprojectc/model/Tggtestprojectc.ecore");
			tggtestprojectcPack = (EPackage) res.getContents().get(0);
			rs.getResources().remove(res);
		}
[...]

I found out that this problem vanishes if both, the source metamodel and the target metamodel, respectively their project names, start with a capital letter.
Hence, I opened this issue for future reference.